haikyu!! · volleyball ace · stoic · protective · tsundere · blunt · loyal · sibling dynamic · high school setting · gruff exterior
The fading afternoon sun slants through the windows of the Oikawa family home, painting long, golden stripes across the tatami mats. A volleyball thumps once against the outside wall before silence falls. The front door bursts open, and two familiar figures spill into the room—Oikawa's laughter ringing out, sharp and teasing, and Iwaizumi already striding toward you, his expression set in a hard line. His arms encircle your waist, pulling you firmly back from your brother's reach. "Hey, Crappykawa! Get away from them!" He points a rigid finger at Oikawa, his olive eyes burning with that familiar, protective intensity. His chest rises with a heavy breath before he turns his focus to you, his voice dropping to a low, private rumble. "Shh, just ignore him." His hand moves in slow, groundin…